src/calf/modules_dev.h

   1 /* Calf DSP Library
   2  * Prototype audio modules
   3  *
   4  * Copyright (C) 2008 Thor Harald Johansen <thj@thj.no>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General
  17  * Public License along with this program; if not, write to the
  18  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21 #ifndef __CALF_MODULES_DEV_H
  22 #define __CALF_MODULES_DEV_H
  23
  24 #include <calf/metadata.h>
  25
  26 #if ENABLE_EXPERIMENTAL
  27 #include <fluidsynth.h>
  28 #endif
  29
  30 namespace calf_plugins {
  31
  32 #if ENABLE_EXPERIMENTAL
  33
  34 /// Tiny wrapper for fluidsynth
  35 class fluidsynth_audio_module: public audio_module<fluidsynth_metadata>
  36 {
  37 protected:
  38     /// Current sample rate
  39     uint32_t srate;
  40     /// FluidSynth Settings object
  41     fluid_settings_t *settings;
  42     /// FluidSynth Synth object
  43     fluid_synth_t *synth;
  44     /// Soundfont filename
  45     std::string soundfont;
  46     /// Soundfont filename (as received from Fluidsynth)
  47     std::string soundfont_name;
  48     /// TAB-separated preset list (preset+128*bank TAB preset name LF)
  49     std::string soundfont_preset_list;
  50     /// FluidSynth assigned SoundFont ID
  51     int sfid;
  52     /// Map of preset+128*bank to preset name
  53     std::map<uint32_t, std::string> sf_preset_names;
  54     /// Last selected preset+128*bank in each channel
  55     uint32_t last_selected_presets[16];
  56     /// Serial number of status data
  57     volatile int status_serial;
  58     /// Preset number to set on next process() call
  59     volatile int set_presets[16];
  60     volatile bool soundfont_loaded;
  61
  62     /// Update last_selected_preset based on synth object state
  63     void update_preset_num(int channel);
  64     /// Send a bank/program change sequence for a specific channel/preset combo
  65     void select_preset_in_channel(int ch, int new_preset);
  66     /// Create a fluidsynth object and load the current soundfont
  67     fluid_synth_t *create_synth(int &new_sfid);
  68 public:
  69     /// Constructor to initialize handles to NULL
  70     fluidsynth_audio_module();
  71
  72     void post_instantiate(uint32_t sr);
  73     void set_sample_rate(uint32_t sr) { srate = sr; }
  74     /// Handle MIDI Note On message (by sending it to fluidsynth)
  75     void note_on(int channel, int note, int vel);
  76     /// Handle MIDI Note Off message (by sending it to fluidsynth)
  77     void note_off(int channel, int note, int vel);
  78     /// Handle pitch bend message.
  79     inline void pitch_bend(int channel, int value)
  80     {
  81         fluid_synth_pitch_bend(synth, 0, value + 0x2000);
  82     }
  83     /// Handle control change messages.
  84     void control_change(int channel, int controller, int value);
  85     /// Handle program change messages.
  86     void program_change(int channel, int program);
  87
  88     /// Update variables from control ports.
  89     void params_changed() {
  90     }
  91     void activate();
  92     void deactivate();
  93     /// No CV inputs for now
  94     bool is_cv(int param_no) { return false; }
  95     /// Practically all the stuff here is noisy... for now
  96     bool is_noisy(int param_no) { return true; }
  97     /// Main processing function
  98     uint32_t process(uint32_t offset, uint32_t nsamples, uint32_t inputs_mask, uint32_t outputs_mask);
  99     /// DSSI-style configure function for handling string port data
 100     char *configure(const char *key, const char *value);
 101     void send_configures(send_configure_iface *sci);
 102     int send_status_updates(send_updates_iface *sui, int last_serial);
 103     uint32_t message_run(const void *valid_inputs, void *output_ports) {
 104         // silence a default printf (which is kind of a warning about unhandled message_run)
 105         return 0;
 106     }
 107     ~fluidsynth_audio_module();
 108 };
 109
 110
 111
 112 #endif
 113
 114 };
 115
 116 #endif